Feasibility study of employing mechanically induced long-period fibre grating as optical-based sensors

บทความในวารสาร

ผู้เขียน/บรรณาธิการ

กลุ่มสาขาการวิจัยเชิงกลยุทธ์

รายละเอียดสำหรับงานพิมพ์

รายชื่อผู้แต่ง: Chinggungval T., Khun-in R., Jiraraksopakun Y., Bhatranand A.

ผู้เผยแพร่: Taylor and Francis Group

ปีที่เผยแพร่ (ค.ศ.): 2021

ชื่อย่อของวารสาร: J. Mod. Opt.

Volume number: 68

Issue number: 21

หน้าแรก: 1173

หน้าสุดท้าย: 1180

จำนวนหน้า: 8

นอก: 0950-0340

eISSN: 1362-3044

URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85115845060&doi=10.1080%2f09500340.2021.1980625&partnerID=40&md5=5f283f2865a0cecec46c18bdc6a52c3f

ภาษา: English-Great Britain (EN-GB)

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บทคัดย่อ

The investigation of long-period fibre gratings formed by a 3D printer with several grating periods is presented here. The proposed grating device was pressed on to an optical fibre to observe the resonant wavelengths as a function of different groove periods. Results showed that devices with 700 and 800 nm grating period introduced resonant wavelengths of 1,487 and 1,570 nm with refractive index changes of 2.121 × 10−3 and 1.963 × 10−3, respectively. Once resonant wavelengths were known, an optical time domain reflectometer (OTDR) was employed to determine light behaviour, event positions, and losses. The OTDR trace revealed that the non-reflective event occurred at the grating perturbation position. Consequently, the wavelength-dependent-resonance was caused by the non-contra-directional coupling of light from the fibre core to fibre cladding and its attenuation was a cubic function of an applied force. The proposed approach, therefore, shows a great potential to be used for the sensing applications in the vulnerable environments. © 2021 King Mongkut's University of Technology Thonburi. Published by Informa UK Limited, trading as Taylor & Francis Group.

คำสำคัญ

Mechanically induced long-period fibre grating, optical sensors